According to AcmeHowTo.com, antifreeze can be removed from a concrete driveway by covering the stain in water, sprinkling powdered laundry detergent on it, covering it in newspaper, wetting said newspaper and letting it all sit for at least three hours. After time is up, a wet nylon bristle brush can be used to scrub the area and ensure that it is completely clean.
If a driveway stain such as antifreeze, oil or gasoline is fresh, it should be cleaned up right away. This is the easiest way to remove the stain. Absorbent materials such as baking soda or cat litter, if immediately applied, soak up the liquid and make the cleaning process simple. After the absorbent material sits for a few hours, the stain can be removed by mixing detergent and water and scrubbing the area.
If an oil or gasoline stain is old, it is best to use degreaser, let it soak for several minutes, and then scrub it with a wire bristle brush. Then apply detergent and water and use a pressure washer to remove the stain completely and clean the driveway. Without a pressure washer, it may take several tries and various cleaning solutions to completely remove the stain.
If at all possible, all fluid stains should be immediately cleaned as they can be poisonous to children and animals.